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Finding the Fourth Proportional to 18,561.66, 25,615.74 and 13,269.12

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Solution

The fourth proportional to 18,561.66, 25,615.74 and 13,269.12 is: 18,311.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,561.66 : 25,615.74 = 13,269.12 : x
  2. Step 2: Convert to fraction form
    18,561.66/25,615.74 = 13,269.12/x
  3. Step 3: Cross multiply
    18,561.66x = 25,615.74 × 13,269.12
  4. Step 4: Simplify right side
    18,561.66x = 339,898,327.95
  5. Step 5: Solve for x
    x = 339,898,327.95/18,561.66
  6. Step 6: Final answer
    x = 18,311.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.